Street-sweeper.



' PATENTED MAR. 24, 1908.

I. NELSON. STREET SWEBPER. APIPLIQALTION TILED OGT.21.1907.'

2 SHEETS-SHEET 1.

THE mamas PETERS co., WASHINGTON, 1:. c.

PATENTED MAR 24, 1908.

J. NELSON. STREET SWEEPER. APPLICATION FILED f 0013.21, 1907.

2 SHEETSSHEET 2.

THE NORRIS PETERS ca, wnsnmaron, n. c.

JOHN NELSON, OF CHICAGO, ILLINOIS.

STREET-SWEEPER.

Specification of Letters Patent.

Application filed October 21, 1907.

Patented March 24, 1908.

Serial No. 398,321.

T 0 all whom it may concern:

Be it known that'I, JOHN NELSON, a subject of 'the King of Denmark,residing in Chicago, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Street-Sweepers, ofwhich the following is a specification.

My invention relates to street-sweepers and has for its object toprovide a streetsweeper adapted to be attached to theback of a cart orwagon and which shall collect the sweepings and deposit them in saidcart or wagon.

My invention is embodied in a streetsweeper comprising a main framemounted upon wheels and equipped with means for attaching the sweeper tothe rear end of a wagon or cart, an auxiliary frame pivotally mountedupon said main frame and carrying a conveyer belt and provided with ashoe at its lower end and a plurality of rotary brushes for collectingthe dirt and depositing it upon said shoe and. conveyer belt.

My invention further consists in means for adjusting the height of theshoe from the ground and in various details of construction andarrangements of parts all as will be hereinafter fully described andparticularly pointed out in the claims.

My invention will be more readily understood by reference to theaccompanying drawings forming a part of this specification and in which,

Figure 1 is a plan view of a street-sweeper embodying my invention, Fig.2 is a side 'elevation thereof, Fig. 3 is a cross section on the line mxof Fig. 1, Fig. 4 is a' detail plan view upon an enlarged scaleillustrating the arrangement of the shoe at the lower end of the belt orconveyer frame, and Fig. 5 is a side elevation thereof.

Referring to the drawings, A indicates the rectangular main frame, ofthe device. This is preferably made of channel iron and comprises sidemembers, 11, the front member, 2, and the rear member, 3. The frame ismounted upon the wheels, 4 and 5, the axle, 6 of the front wheels, 4,being fixed to the frame and the rear axle, 7, attached thereto in themanner hereinafter described. The frame is completed by the transversemember, 8, and the depending members, 9 and 10, in the lower ends ofwhich are journaled the rotary brushes. The members, 9 are arranged atthe ends of the wheels, 4 by sprocket gearing, 16.

I by the stays, 1l11, and the members, 10

depend from the frame member, 3 to which they are rigidly attached. 1212indicate the angularly disposed brushes. These are driven from atransverse shaft, 13, by sprocket gearing, 14. The shaft, 13 is mountedin bearings, 15, upon the transverse member, 8, and is driven from oneof 17 indicates a third brush arranged between the brushes, 12, anddriven from the shaft, 13, by sprocket gearing, 18.

Pivotally mounted upon the front member, 2, of the frame A is theauxiliary or conveyer frame B. This comprises the side members, 1919connected at their upper and lower ends by the axles of the rollers, 20,upon which the conveyer belt, 21 is mounted. Secured to each of themembers, 19 is a plate, 22, pivotally attached to a shaft, 23 mounted inbrackets 24, upon the member, 2. Riveted or otherwise securely fixed tothe lower end of the members, 19, is a shoe, 25, which preferablyextends partially under the brush, 17, and the inner ends of thebrushes, 12.

When the street which is being swept, is smooth, the shoe, 25 ispermitted to drag upon the ground, but if the street is rough, the shoemust be lifted a short distance from the ground, the distance beinggoverned by the condition of the road or street. To regulate the heightof the shoe, I provide the following mechanism. Extending transverselyof the frame A is a shaft, 26, mounted in brackets, upon the sidemembers, 1-1.

Pivotally fixed to the shaft, 26 are a pair of arms, 27 which areconnected by links, 28, to the members, 19 and fixed to one end of theshaft is a lever, 29. It is obvious that by depressing the lever, 29,the frame B will be swung upon its pivot raising the shoe from theground. 30 indicates a segment for holding the lever, hence, the shoe,in proper position. The belt may be driven in any suitable manner. Inthe drawings, I have illustrated one of the rollers, 20 connected withthe shaft, 13, by sprocket gearing, 31, for this purpose.

The conveyer belt and its frame are of sufiicient length, and at asufficient angle to extend above a wagon or cart O, indicated in dottedlines in Fig. 2. In using the device it is secured behind the wagon by adraft member, 32, and as it is drawn along deposits the the transversemember, 8, and are braced l dirt in the wagon. The brushes, 12 sweep thedirt inwardly toward the center of the machine and in front of thebrush, 17, which sweeps it onto the shoe and the belt, 21.

When the machine is being moved from one locality to another when not inoperation, it is desirable to lift the brushes and also the shoe out ofcontact with the ground. To this end, I provide means for raising therear end of the frame A. Extending transversely of the frame A near itsrear end is a shaft, 33, to which are rigidly fixed arms, 34, havingbearings in their ends for the rear axle, 7.

36 indicates a lever rigidly fixed upon the shaft, 33. By depressing thelever, the arms, 34 are swung, raising the rear end of the machine withrelation to the rear axle and moving the brushes and the shoe out ofcontact with the ground.

Having described my invention what I claim as new and desire to secureby Letters Patent is: a

1. In a street sweeper, a main frame mounted upon wheels and providedwith means for attaching it to a wagon or cart, in combination with anauxiliary frame pivotally mounted on said main frame, a belt arranged insaid auxiliary frame, a shoe ar ranged at the lower end of saidauxiliary frame, a plurality of brushes for sweeping the minmiimmmtmmflAMMMMLMMMW street and depositing the sweepings on said belt and meansfor regulating the height of the shoe from the ground, said meanscomprising a transverse shaft mounted on said main frame, a pair of armsrigidly fixed thereto, links connecting said arms with said auxiliaryframe and a lever for turning said shaft, substantially as described.

2. In a street sweeper, a main frame mounted upon wheels and providedwith means for attaching it to a wagon or cart, in combination with anauxiliary frame pivotally mounted on said frame, a belt arranged in saidauxiliary frame, a pair of angularly disposed brushes arranged upon saidmain frame, a smaller brush arranged between the adjacent ends of thefirst said brushes and a shoe arranged at the lower end of saidauxiliary frame between the inner ends of said angularly disposedbrushes, said smaller brush and the lower end of said belt, andoverhanging the latter, substantially as described.

In testimony whereof, I have signed my name to this specification in thepresence of wo subscribing witnesses.

JOHN NELSON.

Witnesses: I

FRANCES E. SHEEHY, ANNA GALLAGHER.

